KR19990040989U - Fastening device for through bolt for preventing loosening - Google Patents

Abstract

The present invention relates to a fastening device for the anti-loosening through bolt, and the fixing nut for providing the tightening force to the head portion of the through bolt protruding through the upper and lower plates as the coupling member and the anti-loosening nut preventing the loosening of the fixing nut in sequence. In the fastening structure of the through bolts to be fastened, the through bolt 10 is formed with a recess 111 at the tip of the leg portion 11 and is cut in a predetermined depth at a circumferential surface adjacent to the recess 111. It is provided with a plurality of free end 112, the inner diameter 31 of the loosening prevention nut 30 is formed in the receiving space 32 having an inclined surface 33 is expanded and in close contact with the free end 112, The apex 421 enters the groove 111 by the clamping force of the pressing shaft 41 and the pressing shaft 41 formed with a spiral groove to be fastened to the inner diameter 31 of the loosening prevention nut 30, and the circumference thereof. Surface 422 is a constant pressure on the inclined surface 33 of the free end 112 of the loosening nut 30 It is provided with a push bolt 40 having a push weight 42 to be extended to be supported by, and to the inner diameter 51 to fasten to the push shaft 41 of the push bolt 40 to restrain the release of the push bolt 40 Characterized in that it has a loosening prevention cap 50 formed with a spiral groove, the release preventing nut is pressed by the free end of the through-bolt to the fixing nut side to restrain the release, providing a pressing pressure The pressing bolt is to prevent the loosening of the fixing nut that provides a tightening force to the through-bolt even with a certain vibration by being restrained by the loosening prevention cap.

Description

Joint device of throught bolt for locking

The present invention relates to a bolt for fixing the two members integrally by the tightening force of the nut, and more particularly to a fastening device of the anti-loosening through-bolt that the tightening force of the nut is continuously maintained even with a certain vibration.

In general, through bolts are provided to tighten two different members that are organically related by receiving the tightening force of the nut. This through bolt is a double nut type as shown in Fig. 1 so that the nut is prevented from being loosened from the effect of vibration when the electric mechanism is mounted on the fastened member or used in the structure of the vehicle. The fastening structure of was applied.

The conventional through-bolt constituting the double nut-type fastening structure in Figure 4 penetrates the upper plate (1) provided with a power mechanism as a connecting member and a lower plate (2) forming the base surface of the leg portion 11, the spiral groove is manifested. In addition, the head 12 is supported on the bottom of the lower plate 2 and fixed with a fixing nut 20 having an inner diameter in which a spiral groove is formed to provide a tightening force to the leg portion 11 protruding through the upper plate 1. It has a configuration for sequentially tightening the loosening prevention nut 30 to prevent loosening of the nut (20).

However, the through bolt 10 having the conventional double nut type fastening structure has a structural limitation that the double fastening method of the fixing nut 20 and the loosening nut 30 is all screw type.

That is, the anti-loosening nut 30 which prevents the loosening of the fixing nut 20 is also loosened by the vibration by the electric mechanism transmitted through the through-bolt 10 in a threaded manner, and means for restraining it are not provided. As a result, there was a problem that the tightening force between the fixing nut 20 and the through bolt 10 is loose.

The present invention has been made to solve the above problems, the object of the present invention is to provide a means for restraining the release of the anti-loosening nut to fasten the anti-loosening through-bolt bolts to maintain the tightening force between the through-bolt and the fixed nut in a constant vibration To provide a device.

Another object of the present invention is to provide a fastening device for preventing loosening bolts for easy release of the means for restraining the loosening provided to realize the above object.

The present invention for realizing the above object is fixed in the claim 1 of claim 3 as shown in Figure 3, providing a tightening force to the head side of the leg portion of the through-bolt formed a spiral groove protruding through the lower plate and the upper plate as the coupling member In the fastening structure of the through-bolt having a configuration for fastening the loosening nut to prevent loosening of the nut and the fixing nut, the through bolt 10 is formed with a groove 111 at the tip of the leg portion 11 and the groove The peripheral surface adjacent to the (111) is provided with a plurality of free ends 112 cut at a predetermined depth at regular intervals, the free end 112 is extended to the inner diameter 31 of the loosening prevention nut 30 is in close contact with A receiving space 32 having an inclined surface 33 is formed, and the pressing shaft 41 having a spiral groove formed therein so as to be fastened to the inner diameter 31 of the release preventing nut 30 is coupled to the pressing shaft 41 by a fastening force. As the vertex 421 enters the groove 111, its circumferential surface 422 It is provided with a push bolt 40 having a push weight 42 for expanding the ends 112 to be supported on the inclined surface 33 of the anti-loosening nut 30 at a constant pressure, the push shaft 41 of the push bolt 40 It is characterized in that the fastening cap 50 is formed with a spiral groove formed in the inner diameter 51 to restrain the release of the pressing bolt 40 by fastening to the).

The technical idea of the present invention by the above characteristic configuration is that the release preventing nut 30 receives the pressing pressure toward the fixing nut 20 by the free end 112 of the through-bolt 10, the release is restrained, the pressing pressure is Providing the pressing bolt 40 is to prevent the loosening of the fixing nut 20 to provide a tightening force to the through-bolt 10 even by a certain vibration by the restraint by the loosening prevention cap 50.

Figure 1 is a perspective view showing the external configuration of the fastening device of the anti-loosening through bolt according to the present invention,

2 and 3 is a view showing the configuration of the fastening device of the through-bolt applied to Figure 1,

2 is an exploded perspective view of a partially cut state;

3 is a cross-sectional perspective view of the fastened state;

Figure 4 is a cross-sectional perspective view showing a fastening device configuration and fastening state of the through bolt according to the prior art.

Explanation of symbols on the main parts of the drawings

10 through bolt 11 leg 12 head

20: fixing nut 30: loosening nut 31,51: inner diameter

32: receiving space 33: inclined plane 40: push bolt

41: push axis 42: push button 43: gripping portion

50: loosening cap 111: groove 112: free end

421 vertex 422 circumferential surface

Hereinafter, with reference to Figures 1 to 3 attached to an embodiment of the present invention in detail as follows.

In the embodiment of the present invention, the same reference numerals are used when using the same names as the conventional names, and different reference numerals are used for the main parts of the present invention.

The present invention in the drawings is supported on the bottom surface of the upper plate (1) and the lower plate (2) as the coupling member and the lower portion (2) and the lower plate (2) formed a spiral groove penetrating the lower plate (2) and the upper plate (1) Combining the upper plate (1) and the lower plate (2) by forming a through-bolt 10 having a head portion 12 and an inner diameter formed with a spiral groove to be fastened to the leg portion 11 of the through bolt (10) It provides a fastening structure for preventing loosening according to the present invention having an organic connection structure to the fixing nut 20 for providing a tightening force, and the leg portion 11 of the through bolt 10 protruding to the upper portion of the fixing nut 20. .

Fastening structure for preventing loosening according to the present invention is the through-bolt 10, the anti-loosening nut 30 to restrain the loosening of the fixing nut 20 to provide a tightening force to the through-bolt 10, anti-loosening nut 30 Compression bolt (40) for restraining the release of the locking bolt, and the release preventing cap (50) for restraining the release of the pressing bolt (40).

The through bolt 10 forms a recess 111 having a predetermined depth in the center of the tip of the leg portion 11 protruding through the fixing nut 20, and the leg portion 11 forming the side wall of the recess 111 is formed. A plurality of free ends 112 are cut at least to the depth of the recess 111 and have a predetermined elasticity.

The anti-loosening nut 30 forms a spiral groove to which the leg 11 and the pressing bolt 40 of the through bolt 10 are fastened to a predetermined range on the upper and lower sides of the inner diameter 31 and the peripheral surface of the center of the inner diameter. It is formed to have a large diameter with respect to the inner diameter of the upper and lower sides in which the spiral groove is formed to form an accommodating space 32, the free end 112 of the through bolt 10 can be expanded without interference, the accommodating space 32 The inclined surface 33 which can be leaned on the free end 112 is formed on the adjacent surface fastened to the leg portion 11 of the through bolt (10).

The pressing bolt 40 has a pressing shaft 41 formed with a spiral groove to be fastened to the upper side of the inner diameter 31 of the release preventing nut 30, and the vertex 421 is recessed by the fastening force of the pressing shaft 41. The circumferential surface 422 which enters the 111 and expands the circumferential surface 422 so that the free ends 112 are supported at a predetermined pressure on the inclined surface 33 of the release preventing nut 30 is greater than that of the recess 111. A pusher weight 42 formed with a large diameter is provided at the lower end of the pusher shaft 41, and a binding surface of a fastening tool such as a spanner is provided to give an easy clamping force that the pusher weight 42 can apply at a constant pressure. Holding portions 43, such as four or six angles, are formed on the upper end of the pressing shaft 41.

The anti-loosening cap 50 prevents the loosening of the pressing bolt 40 and the pressing shaft of the pressing bolt 40 to prevent the inflow of foreign substances through the fastening surface of the pressing bolt 40 and the anti-loosening nut 30. The inner side 51 of which the egg side which formed the spiral groove fastened to the 41 was opened is formed.

Referring to the operation of the present invention by the above configuration as follows.

First, the through bolt 10 according to the present invention is fixed to the leg portion 11 protruding from the upper plate 1 while the leg portion 11 penetrates the lower plate 2 and the upper plate 1 in a conventional manner. The upper plate 1 and the lower plate 2 are in close contact with each other by fastening the 20 to the head 12.

Pressing shaft of the pressing bolt 40 so that the pressing weight 42 of the pressing bolt 40 is located in the receiving space 32 formed in the inner diameter 31 of the release preventing nut 30 according to the present invention in the above state ( 41) is fastened to the lower side of the inner diameter 31 of the anti-loosening nut 30 to a predetermined depth, and then the lower end of the anti-loosening nut 30 is in close contact with the upper end of the fixing nut 20. The lower side of the inner diameter 31 is fastened to the leg portion 11 protruding to the upper portion of the through bolt (10).

At this time, the center of the recess 111 provided at the tip of the leg portion 11 of the through bolt 10 and the center of the pressing weight 42 of the pressing bolt 40 and the free end of the through bolt 10 ( 112 is accommodated in the accommodating space 32 formed in the inner diameter 31 of the anti-loosening nut 30.

Thereafter, when the pressing shaft 41 is rotated by turning the grip 43 of the pressing bolt 40 protruding to the upper portion of the anti-loosening nut 30 with the spanner, the pressing weight 42 descends and the vertex 421 The circumferential surface 422 forcibly expands the grip portion 43 of the through bolt 10 while entering the recess 111 of the through bolt 10. The gripping portion 43 is supported at a predetermined pressure on the inclined surface 33 provided in the receiving space 32 of the loosening prevention nut 30 to restrain the loosening of the loosening prevention nut 30. At this time, the pressing shaft 41 of the pressing bolt 40 is in a state protruding a predetermined length to the upper portion of the release preventing nut (30).

The inner diameter 51 of the anti-loosening cap 50 is fastened to the protruding pressing shaft 41, and the lower end thereof closely adheres to the upper portion of the anti-loosening nut 30, thereby restraining the loosening of the pressing bolt 40. Is done.

On the other hand, release in the fastening state is made simply by rotating in the reverse direction to tighten the release preventing nut 30 without releasing the pressing bolt (40). That is, when the anti-loosening nut 30 is rotated, the pusher weight 42 is supported by the gripper 43 and the gripper 43 is restored to the initial state at the same time as the pusher weight 42 is raised, thereby preventing the loosening. The nut 30 is released.

The present invention has a constant pressure in the direction having the tightening force of the fixing nut to the loosening nut which is fastened to the through-bolts to prevent the loosening of the fixing nut which forms a tight coupling between the members, and also restrains the release of the pressure, thereby preventing The loosening nut is prevented from loosening. Therefore, the product applying the anti-loosening device of the through-bolt of the present invention has the effect of improving the overall reliability by improving the ease of maintenance and the low noise and safety by ensuring close contact between the members even in the vibration of the electric mechanism.

And since the disassembly of the anti-loosening nut after the coupling of the members added to the anti-loosening nut of the present invention is made without the disassembly of the additional member, there is an easy effect of releasing between the coupling members for maintenance.

Claims (1)

Fastening of the through-bolt which is configured to sequentially tighten the fixing nut which provides the tightening force to the head part and the anti-loosening nut preventing the loosening of the fixing nut in the leg part of the through-bolt through which the spiral plate protruding through the lower plate and the upper plate, which is the coupling member. In structure, The through-bolt 10 has a plurality of free ends 112 formed at regular intervals at predetermined intervals on the peripheral surface adjacent to the recess 111 while forming a recess 111 at the tip of the leg portion 11. , An inner space 31 of the anti-loosening nut 30 is provided with a receiving space 32 having an inclined surface 33 to which the free end 112 is extended and in close contact. The vertex 421 enters the groove 111 by the clamping force of the pressing shaft 41 and the pressing shaft 41 formed with a spiral groove so as to be fastened to the inner diameter 31 of the release preventing nut 30. The circumferential surface 422 is provided with a push bolt 40 having a push weight 42 for expanding the free ends 112 to be supported at a predetermined pressure on the inclined surface 33 of the release preventing nut 30, For preventing loosening, characterized in that the fastening cap 41 is fastened to the pressing shaft 41 of the pressing bolt 40 to restrain the loosening of the pressing bolt 40. Fastening device for through bolts.